Rolling mill



Sept. 3, 1940. D. L. MEKEEL ET m. 2,213,714

ROLLING MILL Fi1ed Aug. 21, 1935 4 Sheets-Shea? 2 I lnuehior 8 David L.mekeel y Jdmes H. Caglor Attorney p 1940- D. L. MEKEEL El AL 2,213,714

ROLLING MILL Filed Aug. 21, 1933 4 Sheets-Sheet 3 4 3 r 0 35 7 A i r A39 lnu-erdors David Lmekeel James Cqylor p 3, n. 1.. MEKEEL i-.-r AL2,213,714

ROLLING MILL Filed Aug. 21, 1933 4 Sheets-Sheet 4 lnu'enior's David L.mekeel 10. 95 H. Caylor %%w;

Aiiorney Patented Sept. .3 1940,

; UNITED STATES 2,213,714 ROLLING MILL David L. Mekeel, Coraopolis, and.lamesH. Caylor, Pittsburgh, Pa... assignors to Morgan ConstructionCompany, Worcester,

of Massachusetts Mass., a corporation Application August 21, 1933,Serial No. 686,004 31 Claims. (o1. soq-su) The present invention'relatesin one of its phases to rolling'mills of the type employing verticalrolls, either alone or in conjunction with adjacent horizontal rolls,for the rolling of bars or like metal stock.

One of the objects of the invention is to provide a vertical roll standcharacterized by the arrangement of the rolls, pinions and housings in aunit assembly adapted formovement vertically, so that any of the rollpasses can be brought to the elevation of the pass line withoutdisturbing the relation of the assembled parts. The invention furthercontemplates the utilization of this vertical roll stand in interposedrelation to horizontal roll stands, the latter having provisionfor'iadjustment-horizontally; as'a result of such combined adjustments,it is possibleto maintain the samepass line, both vertically'andhorizontally, through the mill.

Another object of the invention is'tofiprovide for a maximum amount ofvertical adjustment of the roll guides to cover the range of rollpasses, with convenient means for enabling the operator to raise, orlower,- the guides.

A further object of the invention is to provide, vfor rolls havingformed pass grooves, an improved thrust bearing construction whichenables'the grooves to, be accurately alined, and at the same timepermits adjustment of the rolls toward and from each other.

Otherandfurther objects and advantages of the invention will hereinaftermore fully appear from the-following detailed description thereof, taken.in connection with the accompanying drawings, in which:

Fig. 1 is-a plan'view of a portion of a rolling 7 mill employing avertical roll stand embodying the invention, in conjunction withadjacent horizontal roll stands.

Fig. 2 isa view in side elevation of a portion of the parts ofFig. 1,certain portions being shown in section. a

Fig. 3 is an ,enlarged view partially in elevation and partially invertical section along the line3-3 ofFig.2.- v

Fig. 4is a fragmentary view in front elevation showing the constructionof the guide adjusting device on a still larger scale.

Fig. 5 is a view in side elevation of the parts shown in Fig. 4.

,Fig. 6 is a plan view of the vertical roll stand, with parts brokenaway to show further details I of the guide' adjusting mechanism. v

Fig. '7 i a vertical sectional view along the line stand of verticalrolls I, stands of horizontal rolls 2, 2.

' suitable gearing 9. Thus each horizontal roll pass is shiftablehorizontally with respect to the ver- 20 cage 92, within which The cagel2 carrying assemblies slidably supported on suitable vertical 30 guidesor' ways sembly, as-described above, so that vertical move- In order tovertically ment of the cage [2, the latter is adapted to be 4 1-1 ofFig. 6, looking in the direction of the arrows. I

Fig. 8 is a fragmentary view of a portion of the parts of Fig. '7, asviewed fromthe left. I

Like reference characters refer to like parts in 5 the differentfigures.

Referring first to Figs. 1 and 2, the invention is shown in connectionwith a mill consisting of a l interposed between roll stands are ofusual construction, each stand being driven by a motor, not shown,through gearing 3 and a shaft ll coupled at 5 to the driving motor. Asbest shown at the right in Fig. 1, in which the roll shafts i are brokenaway, a frame 6 supporting both the roll and gear housings isshiftablein a horizontal plane by means of a screw shaft '5 driven by amotor 8 through tical roll pass.

Referring now to Figs. 2 and 3, the rolls 1 of the vertical stand aremounted within a housing generally designated by the reference characterit, the housing it) being mounted on a platform 25' The platform H is inturn supported by a is mounted a housing l3 enclosing the pinions I tfor driving the rolls Iv. the roll and pinion housing l5 and I6 of thefixed framework or foundation, and is thus capable of being raised orlowered with respect to said fixed support; to permit of'theseadjustments, the drive for the pinions, i4 is provided by a shaft I!which, being '35 connected to and extending downwardly from one of. thepinions I4 is driven from a horizontal shaft it through gearing l9 and asliding key connection 20.

- As previously pointed templates the arrangement of the rolls, pinionsand housings 'of the vertical stand in a unit as-.-

l2 can be ments of the cage utilized to properly position any verticalroll pass with respect to the 4 horizontal rolls 2, without in any waydisturbing the relation between the rolls I and pinions I. move the cagel2 carrying the'roll and pinion housing assemblies, screw shafts 2! areprovided on opposite sides of .the q cage, the shafts 2| being driven inunison through worm wheels 22' in mesh with suitable worms, not shown,carried on' a motor driven shaft 23. After vertical adjustment of themils l by move-" The horizontal 10 out, the invention con- 4 locked inposition by any suitable 'means, such for example as a doublewedgingarrangement generally indicated by the reference character 24 above thebroken away portion of the right hand screw shaft 2|. The details ofthis wedging arrangement form no part of the present invention, thewedging arrangement being fully shown and described in the Sheperdson,Morgan and OMalley Patent No. 2,083,100, dated June a, 1937.

For the purposes of the present application, suffice it to say that thewedging arrangement 24 normally locks the cage l2 in vertical position,a screw shaft 25 being provided for unlocking-and locking the wedgescooperating with the right hand way I6, in advance of and followingvertical adjustment of the cage l2 by meansaof the shaft 23.

Referring again to Figs. 1 and 2, it is evident from the foregoing thatin setting up the mill for operation, the horizontal rolls 2 can beaccurately adjusted in a horizontal plane to properly aline any passthereof. with respect to the vertical rolls i by adjustment of theframes 6 through screw shafts 1; on the other hand, the rolls I can beadjusted in avertical plane to properly aline any pass thereof" with aselected pass of j v the horizontal rolls by means of the screw shafts2| shifting the cage l2 carrying the'roll unit assembly. These relatedadjustments, therefore, provide means for always maintaining the passline through the mill at a constant height above the mill floor! Asindicated above, the invention also contemplates the provision of meanswhereby the receiving and delivery guides cooperating with the verticalrolls l may-be readily adjusted to cover the full range of passlocations on the rolls I, and this arrangement is best shown in Figs; 4and 5. The receiving and delivery guides 26 and 21 are mounted on guidebars 28 and 29, respectively, each guide bar extending across the spacebetween the vertical legs 18a of the roll housing I 0. Thedelivery guidebar 28 shown in Fig. 4

.is slidable onsuitable vertical ways 30, 38 carried shafts, ,3! to turnin unison.

by the roll housing legs "la, and is vertically movable with respect tothe rolls I, i bymeans of -screw shafts 3l received in threaded engage-The cross shaft 33 extending across the housing, l0 above the rolls I,see Fig. 6, rotationof the shaft 33 by a suitable hand wheel 34causing'the screw hand wheel 34 is therefore adapted to raise, or

lower, the'guide bar 29 and the delivery guide- 21 carriedthereby, itbeing obvious from Fig. 4

that the vertical ran'geof movement of theguide bar 29 is equal to therange of passes on the rolls I.

. Following an adjustment of the guide bar 28 to aline the guide 21'witha selected roll pass,'the

.bar 29 islocked in'arsaosition on the ways 38 by means of clamp bol 35,'the bolts being recelv= able-in vertical slots 36 provided in the ways38. Upon loosening theclamp bolts 35, the welghtoi' the guide bar andguide is borne by" the screw shafts 3l,"so that the guide 21 can beadjustedvery accurately with respect to a roll pass by means of the handwheel 34. The guide barj28 carrying the receiving guide 26 is mounted onthe rear of the roll housing It in substantially the same manner as theguide bar 29, at hand. wheel,

, 3'! mounted on a crossshaft 38 serving to screw shafts '39, in unison,to raise,.or lower he bar 20. Clamp bolts 49 lock the bar- 2s in test bescrewed into the opening 4|.

Rotation of the r the guides 26 and 21 in conjunction with verticaladjustments of the roll and housing unit in order to keep the pass linein the established horizontal plane.

Referring now to Figs. 6, land 8, there is. shown in detail an improvedthrust bearing for one of the vertical rolls 1, whereby the end thrustof the roll is taken in both directions by a bearing structureadjustable in such a manner as to always insure proper registration ofthe pass grooves on both rolls I To this end, the upper roll neck Iaprovides a central opening 4| in which is secured one end of a heavystud 42 provided with an angular enlargement 43 whereby the stud may Thestud 42 further provides a shoulder 44 on which is seated the lowerportion of a sleeve 45 extending upwardly around the stud 42 and held inengagement with the shoulder, 44 by means of a nut 45 and washer 41cooperating with the upper threadedend portion of the stud. The sleeve45 is, also secured to the stud 42 for rotation therewith by means of akey 481 The sleeve 45 provides a shoulder 49 on which is seated a thrustring 50, and the ring 50 is held in engagement with the shoulder 49 bymeans of a collar 5| and a nut 52 cooperating with ex-- ternal threadson the sleeve 45. With the parts assembled as described above, the -t string 50 is substantially part of the stud and associated roll, and so isadapted to transmit the axial thrust of the roll to the anti-frictionbearing members which will next be described.

Theupper and lower annular faces of the thrust ring 58 are engaged by aseries of rollers 53 and 54 respectively, the rollers being held inposition by suitable races 55 and 56 enclosed within a housing 51 whichforms a bearing holder arranged to carry the whole thrust hearingassembly. The housing 51 provides diametrically opposed wings 58 wherebyit is supported, each wing 58 providing as shown in Fig. 8, helicallyformed faces held between correspondingly formed stationary guides 59aand 59b. The lower guide 59b is formed integrally with a bracket 60anchored to 'the roll housing by bolts 6| received in slots 6la, seeFig. 6, the slots 6la being utilized to center the housing 51 withtheroll stud when setting up the bearing.- The bracket 66 in turn carries aclamp 62, which serves to hold in place the upper guide 59a, with bolts63 securing .the clamp 62 to the bracket 68. With the constructiondescribed thus far, it-is apparent that the entire weight of the'roll'l,as well as the axial thrust of the roll in either direction, willbeborne by the sets of rollers 53. and 54 co-' operating with the thrustring 58 and that the entire roll stud and bearing assembly is'carried bythe housing 51. And since the housing 51 is rotatablysupported betweenthe pairs of helical assemblycarried thereb For the purpose of turningthe housing 51 and so obtaining vertical adjustment of the: ro1l,'a

radially extending flange 51a of the housing car.-

ries a worm gear segment 84, as best shown in Fig. 6. The segment 64 isin'mesh with a worm 65 mounted on-a shaft 66 rotatably supported inbearings 61 mounted on. the bracket'ili, and the end of the shaft 66provides a tool receiving portion 68. By turning the shaft 66, the worm65 is adapted to impart angular movement to the housing 51 through thesegment 64, and this angular 'movement is in turn transformed into axialmovement of the roll assembly through the cooperation of the helicalwings 58 with the guides 59a and 582). Therefore, the left hand roll Ican be adjusted vertically'toaccurately register its pass grooves withthe grooves of the vertically fixed right hand roll, any such adjustmentbeing maintained by the locking action between the engaged w'orm 65 andworm gear segment 64.

The above described thrust bearing assembly is adaptable either tovertical rolls or to horizontal rolls. When used on. one roll of a pairof cooperating rolls having formed pass grooves, it provides the'meansfor a close endwise adjustment and positioning of the associated roll,so as 1 of adjusting screws 69, can

to obtain and maintain accurate registry of the selected pass grooves ofsaid rolls. Moreover, its use involves no interference with such radialadjustments of the associated roll as may be required from time to timeto change its spacing, relative to the other roll. Such radialadjustments obtained (see Figs. 3 and'G) by operation be made, withoutdisturbing or affecting the thrust bearing adjustment, because of theprovision of suitable clearare non-concentric'to ances, as shown in Fig.'7, between the collar 5| and the upper bearing race 55, between thethrust ring 50 and the inner wall of housing 51, and.

between the sleeve 45 and the lower bearing race.

56,-this permitting the roll and its attached parts to occupy and tooperate in positions which the housing 51 and its attached partsReferringto Fig. 7,

it will be noted that the arrangement of parts is such that removal ofthe nut 46 permits the roll stud 42 to be withdrawn by downward verticalmovement of the roll, and a new roll with a similar stud substitutedthere' for. Obviously, this substitution of one-roll for another can 'becarried out without in any way disturbing the previous adjustment of thebearing assembly, so that no time is lost in making adjustments afterchanging. the rolls stand. v

As best shown' in Fig. 3, the radial or sleeve bearings for the necks ofthe left hand roll I are held in position against horizontal movement bythe adjusting screws 69, and the lower neck bearthe barrel of the rollsby means of a counterbalancing arrangement consisting of a lever 19' andspring II. This counter-balancing arrangement forms no part of thepresent invention; being fully described and claimed in the aforesaidSheperdson, Morgan and OMalley patent. Consequently, vertical adjustmentof the entire roll and thrust bearing assembly in no way disturbs theadjustment of the roll neck bearings. As also described in the aforesaidpatent, the right 0 h vertical and radial thrust by roll neck bearings.secured to the housing stantially fixed with respect to the verticallyadjustable left hand roll.

In setting up for operation a mill employing a vertical roll standembodying the present invention, the left hand roll is initiallyadjusted endwise by means of the thrust to bring the several passgrooves on the two rolls in exact registration. The roll pinion andhousing unit is then raised, or lowered as desired, to

is preceded, or followed, by lateral thereby in proper alinement ofthevertical I0, so that the right hand roll I is subbearing assembly bringthe selected roll pass to the elevation of the pass line through themill, which adjustment,

the horizontal roll stands to bring the selected horizontal passes intoalinement with the interposed vertical pass. After this, the receivingand delivery guide bars 28 and 29 are raised, or lowered, to bring theguides 26 and 21 carried with the previously established pass line.

We claim,

1. A rolling mill comprising in combination, a set of rolls, powertransmission for said rolls adjustment of comprising intermeshingpinions, spindles and couplings between said rolls and pinions, ahousing for rotatably supporting said rolls, a housing containing saidpower transmission, a cage movable between vertical ways for supportingboth the roll and power transmission housings, with the roll housing onthe top and the transmission housing within said cage and means formoving saidv cage to shift the roll andpower transmission assembly, as aunit.

2. A rolling mill comprising set of rolls, power transmission for saidrolls between said rolls and pinions, a housing for rotatably supportingsaid rolls, a housing containing said power transmission, a cage movablein vertical waysfor supporting the roll and power transmission housings,with the roll housing on the top and the transmission housing withinsaid cage, means for moving said cage to shift the roll and powertransmission assemblies as a unit, and means for locking said cage inposition between the ways with aselected pass of said rolls at the levelof the pass line of the mill. 3. In a rolling mill, the combination witha pair of rolls rotatably' supported about vertical in combination, a

comprising intermeshing pinions, spindles and .cquplings axes and aguide cooperatingwith said rolls, of

bar at its ends to position said guide in alinement with a selected rollpass.

4. In a rolling mill, a vertical roll, a housing surrounding the upperend portion of said roll and bearings carried by said housing for re-,ceiving the axial thrust of said roll in opposite directions, saidhousing being turnable angularly, .and means for converting angularmovement of said housing into axial movement of the roll assembly.- J

5. In a rolling mill, a vertical roll providing an upwardly extendingstud, a sleeve mounted on said stud and 'a vertically adjustable thrustbearing assembly for supporting. said roll through said sleeve, saidroll being removable axially from said sleeve and thrust bearingassembly without disturbing thevertical adjustment of the same. Q 6. Ina rolling mill, a platform located at substantialiy the floor level ofthe mounted onthe top of said platform for rotatably, supporting a pairof vertical rolls, a cage movable between vertical ways below the levelof themiil floor for supporting said platform, power transmission forsaid rollswithin said cage, comprising intermeshing pinions, spindlesand couplings between said rolls and pinions and a housing for saidtransmission suspended from said cage, said platform, cage and housingstomill, a housing g'ether with said rolls and power transmission beingvertically movable as a unit.

7. In a rolling mill, a vertical roll providing an upwardly extendingstud, a sleeve removably mounted on said stud andcarrying a thrust ring,

' 15 sleeve, bearings carried by saidhousing cooperating with saidthrust ring for supporting the. weight of said roll as well as fortaking its axial thrust in both directions, means for turning saidhousing angularly, and means for converting angular movement of saidhousing into axial movement of*the sleeve androll assembly.

9. In a rolling mill, the combination with a vertical roll stand movablevertically, as a unit, to position a selected pass at the pass line ofthe mill, of receiving and delivery guides for the rolls of the stand,horizontal bars carrying said' guides, with each guide supported at itsends by screw shafts, gearing connecting each pair of screw shafts for abar and hand wheels operble from the same side of the roll stand foroperating said gearing to raise. and lower each guide supporting barwith respect to the es-f tablished pass line.

- them, means for moving said housing and power 10. In a rolling mill, ahousing, a roll mounted for rotation'about a verticalaxis, a bearingholder rotatably mounted on said housing, a thrust bearing in saidholder for supportingfthe roll, means for rotating the holder and meansfor converting rotary movement of the holder into axial movement of theroll.

11.'A rolling mill comprising a vertically adjustable rollhousing, apair of vertically disposed rolls mountedin said housing, a powertransmission below said roll housing and'rigidly secured thereto, saidpower transmission being connected to the lower ends of said rolls todrive transmission vertically as a unit and driving I means mounted on afixed base and connected ment of. said roll relative to to said powertransmission by 'a shaft adapted to permit relative mc'fvement'withoutdisturbing the driving connection. a

'12. In a. rolling mill including a mill housing,

rolls rotatably mounted in radial be'aringstherein, and means oradjusting the spacing of therolls,'thecombination with one of the rollsof adjustable thrust resisting mechanism for resisting-axial thrust uponsaid roll and adjusting 'the position of the roll axially, andmeansholding said 'mechanism against movement. relative to the millhousing, said mechanism providing the necessary clearance to permitradial movethe mill housing incident to adjustment of .the spacing ofthe rolls.

13, A rolling .mill including'mill housings, rolls having at least oneformed pass rotatably mount-'- ed in the-mill housings, at least oneof/the rolls having substantially cylindrical necks'and .an-

extension on one of the necks providingopposed end thrust receivingsurfaces and means for adjusting the spacing of, said rolls, radialbearings for the cylindrical necks carried by, the ni'ill housings,opposed thrust bearings cooperating with said thrust receiving surfacesand aflording uflicient radial clearance to permit movement of the rollsincident to adjustment of the spacing of'the rolls, and adjustablesupporting means for ceiving surfaces and means for adjustingthe l0spacing of the rolls, the combination with said roll neck extension ofadjustable means fixed to the mill housing for positioning the rollaxially relative to the mill, said means comprising thrust bearingscooperating with the opposed 1 end thrust receiving surfaces andaffording sufficient radial clearance to permit movement of said rollincident to adjustment of the spacing of the rolls. s x 15. In a rollingmill including a mill housing, 20

rolls rotatably mounted in radial bearings there'- in, at least one ofthe rolls having a roll neck extension providing a radial flange withopposed end thrust receiving surfaces, and means bination with said rollneck extension of adjustable means fixed to the mill housing for'positioning the roll axially relative to the milLsaid means comprisingantifriction thrust bearings cooperating with the opposed end thrust.receiv- 30 ing surfaces on .said flange and slidable radially on .saidflange during rotation of the roll neck extension so as to provide thenecessary clearance permitting adjustment of the rolls in the milltoward and from each other.

16.- In a rolling mill including a mill housing, rolls rotatably mountedin radial bearings therein, at least one of the rolls having a roll neckextension provided with opposed end thrust receiving surfaces, and meansfor adjusting the 40 spacing of the rolls, the combination with saidroll neck extension of thrust bearings cooperating with the opposed endthrust receiving surfaces and affording suflicient radial clearance topermit movement of said roll incident to adjustment ofthe spacing of therolls, a housing carrying said thrust bearings, a support fixed to themill housing and providing guideways for axial movement of the thrustbearing housing relative thereto, and means for adjusting the po-'sition of the thrust bearing housing along said g-uideways. v 17. Ina'rolling inill including a mill housing and rolls mounted therein inradial bearingaat least one of the rolls having a roll neck extension,anda-radial flange on said extensipn, and means for adjusting thespacing of the rolls, the combination with said roll neck extension 01adjustable means cooperating therewith to accurately position the rollaxially relative-to the mill, said means comprising a support fixed tothe mill housing, a thrust bearing housing slidablycarried by saidsupport for movement's axially of the roll neck extension-means foradjusting the thrust bearing housing axially of the roll meekextension,-and thrust bearingsv mounted in said thrust bearing-housingon opposite sides of said flange, said .thrust bearings'bein'gadaptedto' slide radially on said flange during rotation of thelatter sdas to provide the necessary clear-.

'ance for permitting radial movement of said roll'incident to;adjustment of the spacing of the rolls; I

.18. In arolling mill including. mill housings, radial bearingsthereimrolls having at'least-one "(5 for adjusting the spacing of therolls, the com- 25 on opposite sides unit including thrust bearings theopposed thrust receiving surfaces of said roll neck extension andaffording clearance for persaid neck both when coaxial therewith andwhen offset from coaxial relation, whereby radial movement of the neckin adjusting the spacing of the rolls is permitted;

19. In a rolling. mill including mill housings, rolls having at leastone formed pass and necks of the. formed pass, the necks mounted in themill housings, and

means cooperating with said brasses for adjusting the spacing of therolls, at least one of the rolls having substantially cylindrical necks,the combination with said last mentioned roll of means at one end onlyof the roll for axially adjusting the position of said roll relative tothe other roll to true the roll pass comprising a thrust bearing fortaking axial thrust upon said roll, said thrust bearing being-capable ofcooperating with said roll both when coaxial therewith and when offsetfrom coaxial relation whereby the spacing of the rolls may be adjustedwithout disturbin the position of said thrust bearing, and meanscarried" by the mill housing for axially adjusting said thrust bearing.

20. In a rolling mill rolls having at least one formed pass, brassescarried by the mill housing for rotatably mounting the rolls and meansfor adjusting the spacing of the rolls, the combination'with one of therolls of adjustable thrust resisting mecha-' nism for resisting axialrelative to the other roll, and means holding said mechanism againstmovement relative to the mill housing, v said mechanism providing thenecessary radial clearance to permit movement of said roll relative tothe mill housing incident to adjustment of the spacing of the rolls.

21. Adjusting mechanism for attachment to a rolling mill having millhousings and rolls mounted in ating to provide a formed pass, comprisinga roll neck extension adapted to be secured to the neck, of one of therolls providing the formed pass, said extension having opposed thrustreceiving surfaces, a support adapted to be fixedly secured to the millhousing adjacent thereto, and a thrust bearing unit adjustably carriedby the support for movement axially cooperating with mitting radialmovement of the respective roll neck extension, whereby the spacing ofthe roll of the mill connected to opposition to the, radial loadof therolling oper' means associated with one of ation and adjusting A itsaxis radially toward and said rolls to shift from the other roll.

said thrust resisting mechanism being capable of tlius cooperating withbrasses for including a mill housing,

thrust upon said roll" and adjusting the position of the roll axiallyradial bearings therein and cooper- I from the roll housing, andmovement in response 'to the aforesaid radial adof the roll, said saidextension may be adjusted without disturbing the position' of said thecombinatmnwijh said radially adjustable roll of a neck extensionproviding a thrust flange substantially concentric with said roll,anti-friction bearing elements disposed on opposite sides of saidflange, a radially-fixedvbearing housing for said velements, retainingthem in operative relation to said flange to hold the roll againstendwise movement, said bearing hpusing surrounding said flange andsufficiently spaced radially therefrom to avoid interference with saidflange when said roll, by said adjusting means, is shifted intonon-concentric relation to said. bearing housing, means carried by theroll housing for su porting said bearing housing independently of saidrolls, and means formoving said bearing housing endwise in saidsupporting means, to obtain corresponding endwise roll movement for thetruing of said pass.-

23. In a rolling mill whichincludes a pair of rolls cooperating toprovide a formed pass, a roll housing supporting the necks of said rollsin' opposition to the radial load of the rolling operation and adjustingmeans associated with one of said rolls-to shift its axis radiallytoward and from the other roll, the combination with said roll of a neckextension pro-.

endwise movement, said asse'mblyincluding a radially-fixed bearinghousing surrounding said,

neck extension and sufliciently spaced radially therefrom to-permit saidroll, byoperation of said adjusting means, to occupy a non-concentricposition relative to said thrustbearing assembly, a supporting bracketfor said bearing housing, said bracket being adjustably secured. to theroll housing 'andrestrained from endwise movement relative thereto, andmeans for adjusting said bearing assembly endwise in "said supportingbracket, to obtain corresponding endwise roll adjustment for the truingof said pass.

24. In a rolling mill which includes a pair of rolls cooperating toprovide a formed pass, a.

roll housing supporting the necks of said rolls in opposition to theradial load of the rolling operation and adjusting means associated withone of said rolls to shift its axis radially toward and from the otherroll, the combination with outboard thrust bearing unit cooperating withsaid neck extension to hold said roll against endwise movement, meansfor supportingsaid unit justment of said roll, there being sufllcientradial clearance between said unit and'said neck extension to permitsaid rolls adjustment into positions non-concentric with said unit, andmeans for adjusting said unit endwise in.said supporting means to'obtain corresponding endwise roll movement 25. In a rolling mill, a setof rolls, power transmission for said rolls, comprising 'intermeshii gpinions connected thereto, a housing wherein a neck extension of saidradially adjustable'roll, of an for holding it against for the truing ofsaid pass,

said rolls are rotatably supported, asecond hous- 11E containingsaidlpower transmission, vertilcally movable cage supporting both ofsaidhousings, means for moving and power transmission'assembly as a. unit,drivbly mounted on a fixed said cage to shift the roll ing means forsaid asseni base, and a shaft connecting said driving means with saidpower transmission and permitting said movement without disturbance ofthe driving connection. g

26. In a rolling mill, a set of rolls, power transmission for saidrolls, comprising intermeshing pinions connected thereto, a housingwherein said rolls are rotatably supported, a second housing containingsaid power transmission, a vertically movable cage supporting both ofsaid housings, means for moving said cage to'shift-the roll and powertransmission assembly as a unit, means for locking said cage to positiona selected pass of said rolls at the level of the pass line of the mill,driving means for said assembly mounted on a fixed base, and a shaftconnecting said driving means with said powertransmis- I sion andpermitting said movement without dis;

turbance of the driving connection.

27. In a rolling mill, a platform at substantially the'floor level ofthe mill, a housing mounted on said platform for rotatably supporting apair of vertical rolls, a vertically moving cage below the millfioor'level for supporting said platform, power transmission for saidrolls within said cage and comprising intermeshing pinions connected tosaid rolls, a housing for said power transmission carried by said cage,means for vertically moving said cage, to shift as a unit said platformand the roll and power transmission assemblies, driving means for saidassemblies mountedv on a fixed'base, and a shaft connecting said drivingmeans with said power transmission and permitting saidmovement withoutdisturbance of the driving connection.

28. A rolling mill comprising a vertically adjustable roll housing, apair of rolls mounted in. said housing, a power transmission below saidroll housing and rigidly secured thereto, said power transmissionbeingoperativelyconnected to said rolls for driving the latter, means formoving said housing and power transmissionvertically as a unit, drivingmeans for said power transmission mounted on a fixed base,-and a shaftconnecting said driv'ingmeans to said power trans movementrrection.

mission and permitting said-movement without disturbance of the drivingconnection. v

29. A rolling mill comprising a mill housing adjustably supported formovement transversely of the path of the material to be rolled in themill, a pair of vertically disposed rolls having fspaced working passgrooves mounted in said housing, a gear drive connected to the lower endof said rolls, means for moving said housing and gear drive verticallyas a unit, and driving means for said rolls molmted on a fixed base andconnected to said gear drive by a shaft adapted to permit said movementwithout disturbing the driving connection.

. a gear drivefor said rolls movable transversely with said housing,meansfor vertically moving .said housing to adjustthe operative positionof said rolls, and driving means for said rolls mounted on a fixed baseandconnected to said gear drive by a shaft adapted .to permit saidadjusting without disturbing the driving con- 31. A rolling millcomprising a vertically disposedsupporting frame, a mill housing mountedfor vertical movement in said frame transversely of the path of thematerial to be rolled in the mill, screw means for vertically adjustingsaid mill housing in said frame, a pair of vertical working rollsmountedin said housing, a gear .train, for actuating said rolls alsomounted in said frame and connected to the lower'ends of the rolls, anddriving means mounted on a fixed base and connected to said gear trainbya shaft adapted to'permit said vertical adjusting movement withoutdisturbing the driving connection. DAVID L. MEKEEL. JAMES H. CAYLOR.

